Muffler



oct. 19,1926. 9 1,603,910

M. EGNER MUFFLER.

Filed Nov. 10, 192s INVENTOR ATTORNEY Planea ou. 19, 1926.

j UNITED STATES mmm neuen, or anniversari),l omo.

IUFI'LEB.

Application led November 10, 1923. Serial No. 674,065.'

My invention relates to' mulilers and similar devices suchas are used in connection with exhaust or similar systems.

, The main object of my invention is a i simple and `eiicientmuiller means adapted to mitigate the noise of exhaust or similar systems without causing undue back pressure in the system and to be automatically cleaned by the exhaust or other iuid ressure passing therethrough. Other obJects will appear during the description of the apparatus shown in the accompanying drawing.

My inventionl is sufficiently illustrated in the accompanying drawing in which Figi is a general perspective view of a muiller,

partly in section to show the interior arrangement of elements, well adapted for the exhaust of an internal combustion engine and embodying the features oi my inven- U tion; Fig. 2 is a general perspective view of a similar muiler, partly 1n section, showing one manner of attaching my invention to an existin muflier.

Simi ar reference characters refer to similar parts throughout the views.

In order to mitigate or eliminate the noise usually found in exhaust or similar systems, as in the exhaust o an internal combustion engine for instance, it is necessary that a mullling means of some kind is provided; such means however mustnot cause undue back pressure in the system.

Such a muer means is shown in the accompanying drawing and comprises the shell A, the inlet member B, the outlet member C,

andthe partitions D and E.

The shell A is lined with asbestos or other heat insulating and sound absorbing material 10.

0 .The inlet member B is also lined with similar material 11, is secured to one end of the shell A, and is provided with the inlet opening 12. rIt is observed that the bottom of this opening is substantially iiush with 5 the bottom'of the inside of the shell; 'the purpose whereof'will appear presently.

The outlet member C, also lined'wth sirnin lar material 13, in the present' instance is made in the `forrnof an inclined' funnel com' prising the inclined conical member 14 and the inclined conical member 15 having the outlet opening 16 flattened at the outer end to provide the inclinedwall 17. it is to be observed that the bottom of the opening 16 is also substantially flush with the bottom of the inside of the shell; the purpose whereof will appear presently. e

The partition D is located some distance from the inlet member and is rovided with the release apertures 18 over t e entire surface thereof and also with the clear passage opening 19 at the bottom and substantially in align-ment with the openings 12 and 16; the purpose whereof will appear presently. The partition E lis located next to the partition D, between the outlet member C and the partition D, and is provided with a group of release apertures 20 over the upper part thereof and also with the clear assa opening 21 at the bottom substantially in alignment with the openings 12 and 16 and 19; the purpose whereof will appear presently.

The several members may be secured to each other by any suitable means or in any `suitable manner; the joints shown in the drawing give good results and the beaded joint between the shell A and outlet member C afords a ready means of joining these two members to complete the muiller ater each of these elements have been made up as units.

When this muer is in operation, exhaust or other fluid pressure enters the mumer ythrough the opening 12 and travels-into the compartment 22 where it can expand; then travels through the apertures 18 into the compartment 28 and thereby releases the fluid pressure from the compartment 22; then travels through the apertures 20 into the compartment 24 and thereby releases the fluid pressure from the compartment 23. When this fluid pressure leaves the apertures 20, it is given a straight direction as indicated by the single dotted line 25 and impinges on the conical and inclined surface `26 of the member C, is then directed downward in the general direction of the iow of the exhaust and impinges on the surface 27 of the member 15, is then directed upwardly and again in the general direction of the low ofthe exhaust and impinges on the surface 28 of the member 15, whereupon it flows out easily and freely through the outer end of the opening 16. The partition D oeis a certain amount of resistance to the iuid pressure and prevents the same from into the compartment 23 with full force an the partition` E offers additional resistance to the fluid pressure-and directs -thev same towardthe surface 26.

It has previouslyl been stated that'the openings 12, 16, 19, and 21 are all 1n alignment with each other. The purpose thereof is/to automatically clean the inside of the muiller. When fluid pressure enters the mufiler through the opening 12, the force thereof directs it against the artition D at the` bottom and some of this uid pressure .travels through the opening 19 with ractlcally undiminished force, then travels t rough the opening 21 and out throughltheend at the opening 16 as indicated by the single dotted line 29. Therefore, a portion. of this Huid pressure has a free passage way straight through the muiiler at the bottom thereof and will automatically clean or blow out whatever sediment may collect there.

Under ordinary conditions, the mufller shown and described works very well with the two partitions; it is obvious however that more or less than two partitions may be used. It is not necessary that both of the partitions shown are provided in all cases; 1t is quite suflicient in many cases that some sort of a baille means, either square across the muiller as shown or inclined, is provided to direct the fluid pressure longitudinally against the inclined face 26 and then out through the opening 16 as previously stated.

The spout 15 may also be eliminated in some cases since the impingement offered thereby iscomparatively smal A muler of the character described mayv also be constructed for attachment to an existing muiiler as is illustrated in Fig. 2 Where the head B of Fig. 1 is eliminated and the end 30 of the shell A extends over the end 31 of the existing muler F.- In this instance, I refer to slit the -end 30 and employ the cliimp G to firmly secure the end 30 to the end of the muliier F by means of the screw 32. In order to prevent longitudinal separation of the new and the existing mufflers, I also provide the screw 33 extending through both muiers as shown.

It is observed that the present invention, among other features` directs the exhaust against one or more inclined Walls Where it is deflected and thereby, in addition to the other baille means, reduces the force and consequently the noise of the exhaust. The lining on the inside of the muliler also helps to eliminate the noise. The main feature, however, is to provide a deflector means near the discharge end of the mutlier to angularly deiiect the exhaust in a general direction toward the outlet and not deflect it against the general direction of its travel.

I may make modifications other than those pointed out within the scope of the appended.

' 'Iherefore, Awithout limiting m self to the precise construction `shown an describedy and'otherwisedisclosed, I claim Y l rl; lexhaustl muling device, including, a'shell having an exhaust inlet o ni near the bottom of one end thereo a el shaped .outlet meanson the other end of said shell and` sloping downwardly to'form'an inclined baille forsome of theexhaust in the Y general directionof the iowpof the exhaust and having an outlet opening in the outer end thereof in alignment with said inlet opening, anda straight and unobstructed e.

passage way between said openin along the bottom of the inside of said she l to 'permit some of the exhaust to flow "unrestrictedly through the passage way and thereby automatically remove foreign substance from the bottom of the inside of said shell.

2. An exhaust mulin device, including, a shell having an incline outlet member provided with an outlet`V- opening having the lower edge thereof flush with the inside of said shell, baiiling means in said shell and provided with openings in alignment with said outlet opening, an inlet means having an inlet opening in alignment with said outlet opening and with said openings in the battling 'means to forma straight passage way through the muffler device and thereby permit some of the exhaust to flow throu h the passage Way along the bottom of the 1nside of the shell to remove foreign substance therefrom, and said bafiiing means arranged to oder no restriction' to the flow of exhaust through the passage way. p

3. An exhaust mutHer device. including, a shell having a head at each end thereof, one of said heads having an .inlet meansI the other of said heads havingvan outlet means, a partition in said shell /adiacent lto and spaced from the head with the inlet means and provided with apertures staggered over the entire surface thereof, a partition in said shell adjacent to andspaced :from the head with the outlet means'and provided with apertures over a sectoral portion of the surface thereof, theA sectoral portion being out of alignment with the outlet means, and the combined area of the apertures in the lirst mentioned partition being greater than the combined area of the apertures in the secondmentioned partition. y

4. An exhaust muiliing device, including, a shell, an inlet means on one end of said shell'at the bottom-of said device, an inclincd'- funnel shaped outlet member on the other end of said1 shell and the spout thereof located at the bottom of said device, a partition in said shell adjacent to and spaced from said inlet means and provided with release apertures over the entire surface thereof., and a second partition ,in said shell adjacent to and spaced from said outlet member and'provided with a group of rea shell', an inlet means on one end of said shell and the o ening thereof located at the bottom of sai device, an' inclined funnel sha ed outlet member on the other end of sai 4shell ,and the o ning in the spout thereof located at the ttom of saididevice in alignment'withthe opening in said inlet means,- a partition in said shell adjacent to and spaced from said Ainlet means and provided with release a ertures over'the entire surface thereof an with a clear passage aperture near the bottom thereof, said'clear passage aperture in alignment with the openings in said inlet means and thel opening in said s out, and a second artition in said shell ad]acent to and space from'said outlet member and provided with a group of release apertures over the upper surface thereof and with a clear passage opening at the bottom thereof in a 'gnment with the opening in said inlet means and withv the opening in said spout and with .saidv clear paage aperture of the first mentioned partition.

6. An exhaust muiiing a shell havin device, including,

an inlet meanskon one end thereof, a ownwardly inclined funnel sha ed outlet means on the other end of sai shell, a partition in said shell inward of said inlet means ,to form a compartment adjacent rto the inlet end ofsaid shell p' to 1 permit the exhaust to expand therein, a

partition in said shell inward of the first v mentioned partition to form a second compartment between both of the partitionsy to permit the exhaust to Vfurther expand therein and to form athird compartment between the last mentioned partition and said outlet means to permit the. exhaust to further.

expand therein, the first mentioned partiy tion provided with apertures over the ene tire surface thereof to permit the exhaust to flow into the second compartment from any position in the first compartment and without changing the direction of the How thereof, the second'- mentioned partition provided with apertures over the upper surface thereof to direct the flow of the exhaust upwardly and to permit the exhaust to flow into the third compartment and toconne the flowr` thereof to the top ofthe device and to direct the same against, the inclined outlet means. a

In testimony whereof I hereunto aix my eignaturei 'MARTIN Emma; 

